The CellHelmet Altitude X Series Case for Apple iPhone 11 Pro Max smartphones. Black version. Features: - Proprietary protection technologies (patent(s) pending) - Pyramid Protect - raised internal pyramids for ultimate back protection and heat dissipation - Cross Diffuse - cross pattern technology for edge impact dispersion - Protective dual layer design - Outer shell - rugged and texturized nylon (hard plastic) - Inner shell - soft, cushy and texturized TPU (semi-soft rubber) - Slim design